Naomi Watts and Claire Danes

Stephen Colbert and Bob Saget

Stephen Colbert and Bob Saget

One is a comedian/actor/TV host who slays us with his sarcastic breed of humor. The other? A comedian/actor/TV host who once played Danny Tanner in one of our favorite '90s sitcoms ev-er, Full House. Besides those minor differences, it's hard to tell these two apart.